Power lift mechanism for tractors



s. w. CADY 1,911,306

3 ushams-sheet 1 May 30, 1933,

PowER LIFT MEGHANISM FOR TRAcToRs Original Filed oct. zo. 1931 $9/ gli..www NN QN .ww N 11 wbmww @SW1 www 1, M ww ww ww 1&9 QN NN mw. Y NN QN nf ,uw mw a a 1%., QN! WN' kw). Mk1. Nw b9 uw www, W NN a n hd MN m No 1uw, mw %\wl\ May 3o, 1933. s w CADY 1,911,306 POWER LIFT MECHANSM FORTRACTORS Original Filed Oct. 30. 1931 3 Sheets-Sheet 2 May so, 1933. s wCADY 1,911,306

POWER LIFT MECHANISM FOR TRACTORS Original Filed'Oct. 30. 1931 3Sheets-Sheet 5 Patented May 30, 1933 UNITED STATES PATENT oFFlcF.

snnmuN w. cADY, or CANTON, ILLINOIS, AssIeNoa 'ro INTImNamIoNALcoIu'ANY, A oonrona'rIoN or Naw JERSEY i y rom LIFT maman Fon. 'rmc'ronsleled for abandoned application Serial No. 572,088, led October 80,1931.

October 14, 1932. Serial Io. 637,607.

rThis invention relates to a power lift at tachment for tractorscarrying implements mounted thereon.

This application is filed as a substitute for application Serial No.572,038, filed October 30, 1931, which has become abandoned.

A principal object of the invention is to rovide a power lift device ofa novel and improved construction. Another obect 1s to provide a-power`lift attachment a apted to be used in connection with tractor mountedimplements for selectively liftin individual soil workin units or for inependently lifting certam groups of units such, for example, asforwardly positioned units as one group, and rearwardly positioned unitsas anot er group.

In connection with this object a more specilic object is to providelifting means o1 fore and aft spacedv implements of such a nature thatthe soil working engagement of the units can be terminated on the sametransverse line as, for example, at ,the end of a row.

These and other objects which will be apparent from the detalleddescription to follow, are accomplished by a constructionas shown in thedrawings, 1n which: y

Figure 1 is a plan view showingan embodiment of the inventioninconnection with a well known tricycle type oftractor; Y

Figure 2 is a side elevatiox1""with one rear wheel broken away insection, showing'the same construction as Figure 1; and

Figure 3 is a rear view of the same construction shown in Figure 1.

The tractor shown 1n the drawings is of a well known construction, havinside frame members 10, a rear axle and di'erential housing 11, dependinggear housings 12 rigidly connected to the ends of the hous ing 11, andwheels 13 mounted'on stub axles extending outwardly from the lowerportions of the housings 12. A depending hous' ing 14 forwardly of therear axle housing 11 contains gearing connected to the tractor drivemechanism for operating a power takeoff shaft 15 which extends centrallrearwardly from said housing under t e axle housing 11.

This application llod A casing 16 formed as a unitary casting. Saidcasing is shaped to house the Wer lift mechanism and is provided witbearings for the projecting shafts constituting a part of the mechanism.A forwardly projecting 4 shaft 16 is in alignment with the -powcrtakeoff shaft and is connected thereto by,

liftl mechanism and may be indepen ently operated half revolutions-bythe actuation of the hand levers 25 and A26. The particular constructionof the power lift and the means by which the cranks 17 and 18 areoperated does not form a part of this invention and yis not, therefore,`shown in detail. Said mechanism is described and claimed in thecO-pending application, Serial No. 540,142, med Ma 2e, 1931. l

AThe s aft 19 extends transversely across the rear of .the tractor,spaced rearwardly from the housing 11. An integral bearing portion 27 onthe casing-16 and a bearing cap 28, secured to said portion, forms acentral bearing for said shaft. At each end of the shaft 19 bearings areformed in brackets 29, rigidly'secured to the inside portions of thehousings 12. Adjacent the ends of the shaft 19 lifting brackets 30 arerigidly secured and extend upwardly therefrom. The outer portions ofsaid brackets are formed as notched sectors 31 for the engagement oflatches carried by ad'usting levers 32 ivotally mounted on the rackets30. Said ev ers are connected to lifting means for forwardly positionedimplements, to be hereinafter described.` i

The rock shaft 20 is provided with a center bearing support 33 which isrigidly secured to the power lift casing 16 at one side thereof. Theshaft 2O extends across the power. lift mechanism is enclosed in a i alink y dinarily attached to a tractor of this type,

l p tached tureasto is removed when a construction as shown as utilized.At each side of the tractor at the inside of the depending housing 12 arearwardly extending cultivator beam .36 is pivotall attached on4 thetrunnion 37 normally orming the drawbar support. A pluralit of soilworking units 36 are aty `suitable conventional means to each of the.beams 36. A center beam 38 is pivotally connected to a support 39 on atransverse axis. The pivot is of such a narevent lateral movement of thebeam 38. he support 39 consists of a plurality of bars secured to therear axle housing .11. A plurality of soil working units fao 37 'aremounted on the beam` 38. As previously stated, the beam 38 is preventedfrom lateral swin by the construction of its connection wit the support39. The outer beams 36 are maintained against laterall movement by anarch 40 pivotally connected to brackets 41, mounted .at the rear ends ofthe beams.

Adjacent the rear ends lof the beams 36 connecting members 42 aremounted, to which` are secured lifting links 43. Said links are in theform of rods ivotally mounted between the bifurcated en s of the liftingarms 35. Nuts are threaded at the outer ends of the rods 43.Intermediate the ends of said rods compression springs abut at one endthe blocks 44 and at the other end stops. This lifting link constructionis of a conventional nature and provides means for sitively liftingv thecultivating beams an resiliently pressing them downwardly into operatingposition. An

`exactly similar llink 43 is connected t'o a member 42 on the centerbeam 38 and to the center lifting arm 35.

By the operation of the rock shaft 20 it will be understood that lall oflthe rear. wardly positioned soil working units are simultaneouslylowered into working posil units illustrated are attached to thetractorv tion and lifted by movement of -the rock shaft in the rspectiveangular directions. The forwa 1y positioned soil worki by a.construction similar to that shown in theco-pending a plication, SerialNo. 483,-

164, filed Septem r 20,1930. A cross beamv 44 is secured forwardl ofthetractor by a wardly extending portion of the frame.

stucture 45. The cross beam is in the form of a circular shaft and asleeve 47 is rotatably mounted `on said shaft at each end between theframe structure and the end of the beam. Rearwai'dly and downwardlyextending cultivating beams 48 are rigidl' secured by attaching bracketsto the s eeves 47. Cross arches 49 connect the cul- ,tivating beams ateach side of the tractor together to prevent lateral movement of suchbeams with respect to each other. A soil working unit 50 isconnected toeach of the cultivator beams, the construction shown being adaptable forcultivating the adjacent sides of rows of plants. A li'ftin lever 51 isrigidly secured at each side of t e tractor to the respective sleeves 47A lifting beam 52 is pivotally connected to each of ythe levers 51 andto the lifting levers 32 at 4the rear of the tractor, previouslydescribed. Said beam is of 'a construction strong enough' to maintainrigidity under compression suiiicient to rotate the levers 51 forwardlyfor lifting the cultivating beams 48. 4To assist in lifting said beamsand to provide means for resiliently holding the soil working implementsin .working position rods 53 are pivotally connected at the rear end ofeach of the .cultivator beams and extend upwardly and forwardly throu hlaterall ex' tending members 54 secure to the 'li ing beams 52 atpositions rearwardly of the for l ward ends` and somewhat forwardly fromthe positions of the earth working units.

at the outer end be ond the member 54 through which the r slidablyextends and a second stop 56 is provided intermediate the ends of therod. A compression spring 57- the above description. VThe forward rockshaft 19, which is actuated by the power lift y On each of the rods 53 astop 55 is provided A mechanism through the crank 17, the link 21 andthe lever 22, is operable to lift and 'lower the forwardly positionedsoilI workin units by means of the lifting beams 52 an the'associatedelements at each vend thereof. The rearwardly positioned units arelifted and lowered by means of the rock shaft 20 and the associatedparts, abve'described in detail. `The operator ofv the tractor byindependent loperation of the levers 25 and 26 may selectivel lifteither the -forwardly or the rearward y positioned implements.

This ,is a particularly advantageous feature under a great manyconditions. Forexamle, when an obstruction such as a rock is ingencountered, the front implements may be lifted to pass over the rockand then lowered into working position. The rear implements may then beoperated in a like manner. Anot er example of the utility of thisconstruction is when cultivating row crops it is desirable that both therear and front implements be o rated to the end of the row wherever ossile. Whenever there is suflicient room or the tractor to maintain itsforward movement the forward implements may be lifted when the endy ofthe row is reached. Subsequently the rear implements may be lifted assoon as said im.

plements have reached the end of the row. The same procedure may befollowed in reverse manner when beginning the row.

It is to be understood that applicant has shown and described only apreferred embodiment of his improved power lift attachment for tractormounted implements and that he claims as hisinvention all modificationsfalling within the scope of the appended claims.

What is claimed is:

1. A tractor field implement comprising a tractor, forwardly positionedsoil working implements connected to said tractor, a rock v shaftmounted transversely of the tractor at I having soil working unitsmounted at dif' unit may be independently lifted the rear thereof, meansfor connecting said shaft to the forward units for alterin their workingpositions, rearwardly posltioned units connected tothe tractor, a secondrock shaft mounted at the rear of the tractor transversely thereof,means for connecting said shaft to the rearwardly positioned unit foraltering their working positions, a power lift casing mounted at therear of the tractor,

said lcasing having a part of lifting arms projecting therefrom andbeing operable to ift 'selectively either arm, and actuatin linksconnectmg said cranks to the roc shafts, whereby the front and rearunits may vbe selectively and independentl lifted.

2. In a tractor mounted fiel implement ferent locations thereon, a powerlift mechanism mounted on the tractor and operated thereby, saidmechanism comprisin independently operable lift means, paral el rockshafts mounted on thel tractor, means for connecting each of said rockshafts to one of the soil working units and means for connecting eachrock shaft to one of the independently operable lift means whereby eachand lowered.

'3. A tractor mounted field implement comprising, in combination with atractor having soil working units mounted at different locationsthereon, a power mechanism mounted on the tractor Vand operated thereby,

units may be lift mechanism mounted on the tractor and operable thereby,said mechanism includin a plurality of independently operated li t eindependently admeans, parallel rock shafts mounted transversely of thetractor at the rear thereof each of said shafts being connected to oneof the lift means, and means connecting each of the soil workingimplements to one of the rock shafts whereb the units may be selectivelyand indepen ently lifted and lowered.

5. A tractor field implement comprising,

'in combination with a tractor, forwardly positioned soil workingimplements connected to the tractor, a rock shaft mounted on thetractor, means for connecting said shaft to the forward units,rearwardly positioned implements connected to the tractor, a second rockshaft parallel to the first named rock shaft, means for connecting saidshaft to the rearwardly positioned implement, a casing mounted on thetractor, said casing euclosin power lift mechanism and having a pair oylifting arms projecting therefrom, and actuating links connectingl saidarms respectively to the rock shafts whereby the front and rear unitsmay be selectively and independently lifted.v

6. A tractor field implement comprising, in combination with a tractor,forwardly positioned `soil working implements connected to the tractor,a rock sha-ft mounted on the tractor transversely thereof, means forconnecting. said shaft to the forward units, rearwardly positionedimplements connected to the tractor, a second rock shaft arallel to thefirst named rock shaft, means or connecting said shaft to the rearwardlypositioned implements, a casing mounted on the tractor, said casingcontainin power lift mechanism havin a pair o lifting arms projectingthere rom, and actuating links connecting said arms respectively to therock shafts whereby the front and rear selectively and independentlylifted.

7, A tractor field implement comprising, in combinationwith a tractor,soil working units mounted at dierent locations thereon, a pair of rockshafts mounted at the rear o the tractor, said rock shafts beingparallel and extending transversely across the rear of the tractor, saidcasing enclosn v ing power lift mechanism and having a pair of liftingarms pro'ecting therefrom, said arms 'being indepen ently operable, andac- 5 tuating links connecting the arms ,respec tively to the rockshafts Whereb the soil working units may be indepen ently adjusted. l j

8. A tractor field implement comprising, o in combination with a tractorhaving a transverse rear axle housing, soil Working units mounted atdifferent positions thereon, a air of rock shafts mounted at the rear othe tractor on the axle housing, said l', rock shafts being arallel andextendin transversely across t e tractor, a power l t casing mounted atthe rear of the tractor on the axle housing, said casinghaving a pair oflifting arms pro'ecting therefrom, said o arms being indepen entlyoperable, and actuating links connecting the arms respectively to theIrock shafts whereb -the soil working units may be indepen ently adsjusted.

In testimony whereof I'aiix my signature.

SHERMAN W. CADY.

Isisv

